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ImHex/main/gui/source/messaging/win.cpp

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#if defined(OS_WINDOWS)
#include "messaging.hpp"
#include <hex/helpers/logger.hpp>
#include <windows.h>
namespace hex::messaging {
std::optional<HWND> getImHexWindow() {
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HWND imhexWindow = nullptr;
::EnumWindows([](HWND hWnd, LPARAM ret) -> BOOL {
// Get the window name
auto length = ::GetWindowTextLength(hWnd);
std::string windowName(length + 1, '\x00');
::GetWindowText(hWnd, windowName.data(), windowName.size());
// Check if the window is visible and if it's an ImHex window
if (::IsWindowVisible(hWnd) == TRUE && length != 0) {
if (windowName.starts_with("ImHex")) {
// It's our window, return it and stop iteration
*reinterpret_cast<HWND*>(ret) = hWnd;
return FALSE;
}
}
// Continue iteration
return TRUE;
}, reinterpret_cast<LPARAM>(&imhexWindow));
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if (imhexWindow == nullptr)
return { };
else
return imhexWindow;
}
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void sendToOtherInstance(const std::string &eventName, const std::vector<u8> &args) {
log::debug("Sending event {} to another instance (not us)", eventName);
// Get the window we want to send it to
HWND imHexWindow = *getImHexWindow();
// Create the message
// TODO actually send all arguments and not just the eventName
std::vector<u8> fulleventData(eventName.begin(), eventName.end());
fulleventData.push_back('\0');
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fulleventData.insert(fulleventData.end(), args.begin(), args.end());
u8 *data = &fulleventData[0];
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DWORD dataSize = fulleventData.size();
COPYDATASTRUCT message = {
.dwData = 0,
.cbData = dataSize,
.lpData = data
};
// Send the message
SendMessage(imHexWindow, WM_COPYDATA, reinterpret_cast<WPARAM>(imHexWindow), reinterpret_cast<LPARAM>(&message));
}
bool setupNative() {
constexpr static auto UniqueMutexId = "ImHex/a477ea68-e334-4d07-a439-4f159c683763";
// Check if an ImHex instance is already running by opening a global mutex
HANDLE globalMutex = OpenMutex(MUTEX_ALL_ACCESS, FALSE, UniqueMutexId);
if (globalMutex == nullptr) {
// If no ImHex instance is running, create a new global mutex
globalMutex = CreateMutex(nullptr, FALSE, UniqueMutexId);
return true;
} else {
return false;
}
}
}
#endif